Really good commentary by Khalil al-Anani:
After the revolution, the MB's leaders replaced Mubarak's repression with the opposition's conspiracy against their rule as a rallying point. It is one of many tactics that are employed by these leaders in order to maintain members' loyalty and sustain the unity and coherence of the movement particularly during hard times or crises. Therefore, although they are in power, they continue to perceive themselves as "victims" of the opposition which turned to be the "external enemy" that attempts to undermine the "Islamic project" regardless of what the latter means. Ironically, the most powerful opposition to the MB's rule now comes from Salafis and other Islamist forces not from liberal and secular forces. More importantly, by treating the opposition as an uncompromising "foe" the MB leadership could ensure members' adherence and maintain their control over the organization. Indeed, the attacks on the MB's headquarters in Mokattam in March was a golden chance for leadership to feed this narrative and internalize within members' mindset. "Now the entire tanzim (organization) is under the control of the conservatives and all members would unwaveringly support President Morsi to the end of his tenure," a senior member of the MB told me. Clearly, the more the opposition presses the MB, the more solid and coherent the movement becomes.
Hence the importance of constantly exaggerating the role of the opposition — and particularly the NSF — in fomenting unrest, even though there's scant evidence that ElBaradei and friends are putting thousands on the street. The MB does not know how to maintain coherence among its diverse members without fighting culture wars.